Callirhytis fulva, new species

Host. — Quercus chrysolepis Liebmann.

Gall. — Hemispherical when single or forming a hemispherical group with individual galls compressed laterally into angular cross-section by mutual pressure, produced on roots just under surface of ground. Single galls measure up to 22 mm. in diameter by 18 mm. high, groups of two to eight measure up to 35 mm. diameter. Tissue of gall mustard yellow, pithy distally, becoming more compact about the proximally placed larval cell.

Type locality. — San Gabriel Mountains, California.

Biology.— Collected one-half mile above Coldbrook Camp in San Gabriel River canyon above Azusa, California, August 6, 1916. The larvae change into pupae about November 1, and into adults later in the autumn, but probably do not emerge until next spring. In breeding cage out of doors at Evanston, Illinois, they issued March 10-19.

Callirhytis fulva Weld

Quercus chrysolepis
"Root" galls
Fig 32. Tissue fibrous, yellow, dia up to 20 mm.

32. Q. chrysolepis. In Canyon above Azusa the fresh galls contained full-grown larvae on Aug. 6, dark pupae on Nov. 25 and adults emerged March 10 and 19.